# Atmel EDBG-based Tools Protocols
Hints and tips

### Configuration

Configuration takes place before or during a session is active by using the Query, Set and Get commands. The following configuration elements are required:

- PHYSICAL / INTERFACE: the host must specify whether JTAG or aWire physical interface is to be used

- PHYSICAL / JTAG_CLOCK: the JTAG clock frequency (in kHz) must be specified when using JTAG mode

- PHYSICAL / JTAG_DAISY: the JTAG daisy chain parameters must be specified when using a daisy chained target

- PHYSICAL / AWIRE_BAUD_MAX: the maximum aWire baud rate can be specified when using aWire mode.

Note that before continuing with activation of physical the CMD_HOUSEKEEPING_START_SESSION must be called, see the section called “Start session”.

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